(19)
(11) EP 1 154 594 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.08.2004 Bulletin 2004/34

(43) Date of publication A2:
14.11.2001 Bulletin 2001/46

(21) Application number: 01111583.9

(22) Date of filing: 11.05.2001
(51) International Patent Classification (IPC)7: H04L 5/02
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 11.05.2000 JP 2000138181

(71) Applicant: NEC CORPORATION
Tokyo (JP)

(72) Inventor:
  • Ichiyoshi, Osamu
    Minato-ku, Tokyo (JP)

(74) Representative: Betten & Resch 
Patentanwälte, Theatinerstrasse 8
80333 München
80333 München (DE)

   


(54) Data transmission using multicarrier CDMA


(57) A spreading code setting circuit generates N vectors, as spreading codes, which are +1 or -1 polarity and are unique to users. A multiplier multiplies the nth data and the nth spreading code corresponding thereto for the spread modulation. An FDM combining circuit modulates N pieces of data according to the FDM method. A FDM separating circuit demodulates received signals according to the FDM method. An inverse spreading code setting circuit generates N vectors, as inverse spreading codes, which are +1 or -1 polarity and are unique to users at the transmission side. A multiplier multiplies the nth data and the nth inverse spreading code corresponding thereto for inverse spread modulation.






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